气候变化领域集成服务门户(CCPortal): Geochemistry and shale gas potential of the lower Permian marine-continental transitional shales in the Eastern Ordos Basin

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DOI	10.1177/0144598720979242
	Geochemistry and shale gas potential of the lower Permian marine-continental transitional shales in the Eastern Ordos Basin
	Wei, Jingyi; Wang, Yongli; Wang, Gen; Wei, Zhifu; He, Wei
通讯作者	Wang, YL (通讯作者)，Chinese Acad Sci, Key Lab Cenozo Geol & Environm, Inst Geol & Geophys, Beijing, Peoples R China. ; Wang, G (通讯作者)，Chinese Acad Sci, Gansu Prov Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou, Peoples R China.
发表日期	2021
ISSN	0144-5987
EISSN	2048-4054
起始页码	738
结束页码	760
卷号	39 期号:3
英文摘要	Marine-continental transitional strata were widely developed in the Ordos Basin in Upper Carboniferous - Lower Permian. The Taiyuan - Shanxi Formation possesses promising shale gas exploration layers. Shale samples from two drilling wells of Shanxi-Taiyuan Formation in Shilou and Xixian, Ordos Basin, were investigated to study their carbon-sulfur contents and distribution characteristics of organic components using carbon/sulfur analyzer and gas chromatography-mass spectroscopy. Using results of total organic carbon analyses, Rock-Eval pyrolysis, X-ray diffraction analysis, shale gas desorption experiments, and other relevant experimental data, the shale samples were comprehensively analyzed. The exploitability of the shale in the study area was evaluated. The Shanxi-Taiyuan Shale in the Shilou and Xixian areas was characterized by high total organic carbon contents of 7.1% and 2.1% and high T-max values of 499 and 505 degrees C, respectively. The organic matter of the shale is types II2 and III. Moreover, biomarker parameters including n-alkanes, P-aq, P-wax, average carbon chain length, and the ternary diagram of C-27-C-28-C-29 steranes show the organic matter constituted terrestrial higher plants and aquatic low biological algae. Multiple n-alkane parameters show the organic matter input in the Shilou area is mainly derived from terrestrial higher plants. The Pr/Ph value and trace element indicators show the deposition environment is dominated by weak oxidation-reduction conditions. A shale gas desorption experiment shows the average desorbed gas contents of the shale samples in the Shilou and Xixian areas were 1.79 and 0.37 m(3)/t, respectively. The organic matter content determined the differences in shale gas properties between the two areas in Ordos Basin. The composition and content of inorganic minerals affect the reservoir physical properties. According to the analyses, the shale in the Shilou area has good shale gas reservoir characteristics in terms of desorbed gas content and the above-mentioned geochemical parameters. Furthermore, the Shanxi shale has good potential for shale gas industrial exploitation.
关键词	SICHUAN BASIN NATURAL-GAS SHANXI FORMATION CARBON ISOTOPES LONGMAXI SHALE DESORPTION GAS ORIGIN SEDIMENTARY FIELD INDICATORS
英文关键词	Marine-continental transitional shale; Shanxi-Taiyuan formation; desorbed gas content; physical properties of reservoir; Ordos Basin
语种	英语
WOS研究方向	Energy & Fuels
WOS类目	Energy & Fuels
WOS记录号	WOS:000642587000003
来源期刊	ENERGY EXPLORATION & EXPLOITATION
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253923
作者单位	[Wei, Jingyi; Wang, Yongli] Chinese Acad Sci, Key Lab Cenozo Geol & Environm, Inst Geol & Geophys, Beijing, Peoples R China; [Wei, Jingyi] Univ Chinese Acad Sci, Beijing, Peoples R China; [Wang, Yongli] CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China; [Wang, Gen; Wei, Zhifu; He, Wei] Chinese Acad Sci, Gansu Prov Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Wei, Jingyi,Wang, Yongli,Wang, Gen,et al. Geochemistry and shale gas potential of the lower Permian marine-continental transitional shales in the Eastern Ordos Basin[J]. 中国科学院西北生态环境资源研究院,2021,39(3).
APA	Wei, Jingyi,Wang, Yongli,Wang, Gen,Wei, Zhifu,&He, Wei.(2021).Geochemistry and shale gas potential of the lower Permian marine-continental transitional shales in the Eastern Ordos Basin.ENERGY EXPLORATION & EXPLOITATION,39(3).
MLA	Wei, Jingyi,et al."Geochemistry and shale gas potential of the lower Permian marine-continental transitional shales in the Eastern Ordos Basin".ENERGY EXPLORATION & EXPLOITATION 39.3(2021).